import java.util.Scanner;

public class Text3 {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int base=2000;
        System.out.println("本月销售额");
        int prize=sc.nextInt();
        double temp= prize*0.03;
        double sum= base+ temp;
        System.out.println(sum);
    }
}
